Revert of [sync] Replace FakeServer's implementation with LoopbackServer invocations.

components/sync/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/features.gni")
 import("//components/sync/protocol/protocol_sources.gni")
 import("//testing/test.gni")
 
 static_library("sync") {
@@ skipping 1006 matching lines @@
       "//components/policy/core/browser",
     ]
   }
 
   defines = [ "SYNC_TEST" ]
 }
 
 static_library("test_support_fake_server") {
   testonly = true
   sources = [
+    "test/fake_server/bookmark_entity.cc",
+    "test/fake_server/bookmark_entity.h",
     "test/fake_server/bookmark_entity_builder.cc",
     "test/fake_server/bookmark_entity_builder.h",
     "test/fake_server/entity_builder_factory.cc",
     "test/fake_server/entity_builder_factory.h",
     "test/fake_server/fake_server.cc",
     "test/fake_server/fake_server.h",
+    "test/fake_server/fake_server_entity.cc",
+    "test/fake_server/fake_server_entity.h",
     "test/fake_server/fake_server_http_post_provider.cc",
     "test/fake_server/fake_server_http_post_provider.h",
     "test/fake_server/fake_server_network_resources.cc",
     "test/fake_server/fake_server_network_resources.h",
     "test/fake_server/fake_server_verifier.cc",
     "test/fake_server/fake_server_verifier.h",
+    "test/fake_server/permanent_entity.cc",
+    "test/fake_server/permanent_entity.h",
     "test/fake_server/sessions_hierarchy.cc",
     "test/fake_server/sessions_hierarchy.h",
+    "test/fake_server/tombstone_entity.cc",
+    "test/fake_server/tombstone_entity.h",
+    "test/fake_server/unique_client_entity.cc",
+    "test/fake_server/unique_client_entity.h",
   ]
 
   deps = [
     ":sync",
     "//base",
     "//net",
     "//testing/gtest",
     "//url",
   ]
 
@@ skipping 96 matching lines @@
     deps = [
       ":fake_server_jni",
       ":sync",
       ":test_support_fake_server",
       "//base",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }